class_docstr: The configuration space of a schedule.
code: def __len__(self):
      if self._length is None:
          self._length = int(
              _np.prod([len(x) for x in self.space_map.values()])
          )
      return self._length
  
imports: from collections import OrderedDict
  import numpy
label_desc: Use image node_id 3 for calling the ConfigSpace obj's underlying member method code with example usage: obj.__len__() and returns: self